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50 template <
typename ColumnView>
52 static_assert(std::is_same_v<ColumnView, column_view> or
53 std::is_same_v<ColumnView, mutable_column_view>,
54 "table_view_base can only be instantiated with column_view or "
58 std::vector<ColumnView> _columns{};
62 using iterator = decltype(std::begin(_columns));
226 template <
typename InputIterator>
307 return std::any_of(view.
begin(), view.
end(), [](
auto const& col) { return col.nullable(); });
320 return std::any_of(view.
begin(), view.
end(), [](
auto const& col) { return col.has_nulls(); });
331 return std::any_of(input.
begin(), input.
end(), [](
auto const& col) {
332 return col.has_nulls() ||
333 std::any_of(col.child_begin(), col.child_end(), [](auto const& child_col) {
334 return has_nested_nulls(table_view{{child_col}});
378 std::vector<size_type>
const& map,
390 template <
typename TableView>
393 extern template bool is_relationally_comparable<table_view>(
table_view const& lhs,
395 extern template bool is_relationally_comparable<mutable_table_view>(
mutable_table_view const& lhs,
A set of mutable_column_views of the same size.
const_iterator begin() const noexcept
Returns an iterator to the first view in the table.
mutable_table_view(std::vector< mutable_table_view > const &views)
Construct a table from a vector of table views.
table_view select(std::vector< size_type > const &column_indices) const
Returns a table_view with set of specified columns.
table_view select(InputIterator begin, InputIterator end) const
Returns a table_view built from a range of column indices.
mutable_column_view & column(size_type column_index) const
Returns column at specified index.
table_view_base & operator=(table_view_base const &)=default
Copy assignment operator.
int32_t size_type
Row index type for columns and tables.
table_view_base & operator=(table_view_base &&)=default
Move assignment operator.
A non-owning, immutable view of device data as a column of elements, some of which may be null as ind...
Type declarations for libcudf.
table_view_base(table_view_base const &)=default
Copy constructor.
size_type num_rows() const noexcept
Returns the number of rows.
A non-owning, mutable view of device data as a column of elements, some of which may be null as indic...
bool has_nested_columns(table_view const &table)
Determine if any nested columns exist in a given table.
bool is_relationally_comparable(TableView const &lhs, TableView const &rhs)
Indicates whether respective columns in input tables are relationally comparable.
table_view(std::vector< table_view > const &views)
Construct a table from a vector of table views.
A set of cudf::column's of the same size.
iterator begin() noexcept
Returns an iterator to the first view in the table.
iterator end() noexcept
Returns an iterator one past the last column view in the table.
bool nullable(table_view const &view)
Returns True if any of the columns in the table is nullable. (not entire hierarchy)
size_type num_columns() const noexcept
Returns the number of columns.
table_view_base(std::vector< ColumnView > const &cols)
Construct a table from a vector of column views.
const_iterator end() const noexcept
Returns an iterator one past the last column view in the table.
table_view scatter_columns(table_view const &source, std::vector< size_type > const &map, table_view const &target)
Copy column_views from a table_view into another table_view according to a column indices map.
A set of cudf::column_view's of the same size.
bool have_same_types(table_view const &lhs, table_view const &rhs)
Checks if two table_views have columns of same types.
table_view_base(table_view_base &&)=default
Move constructor.
bool has_nulls(table_view const &view)
Returns True if the table has nulls in any of its columns.
bool has_nested_nulls(table_view const &input)
Returns True if the table has nulls in any of its columns hierarchy.
decltype(std::begin(_columns)) iterator
Iterator type for the table.
Base class for a table of ColumnViews.
size_type distance(T f, T l)
Similar to std::distance but returns cudf::size_type and performs static_cast
decltype(std::cbegin(_columns)) const_iterator
const iterator type for the table
ColumnView const & column(size_type column_index) const
Returns a reference to the view of the specified column.
std::vector< column_view > get_nullable_columns(table_view const &table)
The function to collect all nullable columns at all nested levels in a given table.
column view class definitions
size_type is_empty() const noexcept
Returns true if num_columns() returns zero, or false otherwise.